Calcium has been know about before the Greek and Roman times. They used compounds with calcium in them for a long time. Sir Humphrey Davy was the first scientist who was able to get pure calcium using an electrolysis. He did this in the year 1808. Calcium is actually a hard silver rock. When it is not purified then it is in many different forms. One of these being in your body. Your bones are filled with calcium that keeps them strong. That is why your parents tell you to drink a lot of milk if you want to be strong one day! Calcium is used in making cement as well. If you are looking for calcium then you will not find any in nature. It is commercially produced.
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